Table T1. Compilation of deep drill holes into in situ ocean basement, DSDP and ODP, 1968-2003.
Leg
Hole
Latitude
Longitude
Ocean
Water depth
(m)
Age (Ma)
Sediment thickness
(m)
Basement penetration (m)
Recovery (%)
Spreading rate
Comments
Lithology
24 238 11°09.21´S 70°31.56´E Indian 2845 30 506 81 50 S/I Projection of Chagos-Laccadive Plateau Basaltic lavas
26 257 30°59.16´S 108°20.99´E Indian 5278 120 262 65 50 S/I Wharton Basin off Perth, Australia Basaltic and breccia
34 319A 13°01.04´S 101°31.46´W Pacific 4296 16 98 59 25 F Bauer Deep, 13°S East Pacific Rise Basaltic lavas
37 332A 36°52.72´N 33°38.46´W Atlantic 1851 3.5 104 331 10 S Mid-Atlantic Ridge 36-37°N Basalt, basalt breccia, interlayered sediments
37 332B 36°52.72´N 33°38.46´W Atlantic 1983 3.5 149 583 21 S Mid-Atlantic Ridge 36-37°N Basalt, basalt breccia
37 333A 36°50.45´N 33°40.05´W Atlantic 1666 3.5 218 311 8 S Mid-Atlantic Ridge 36-37°N Basalt, basalt breccia
37 335 37°17.74´N 35°11.92´W Atlantic 3188 15 454 108 38 S Mid-Atlantic Ridge 36-37°N Basaltic lavas
45 395A 22°45.35´N 46°04.90´W Atlantic 4485 7.3 92 571 18 S Mid-Atlantic Ridge 23°N Basaltic lavas and breccia
45 396 22°58.88´N 43°30.95´W Atlantic 4450 9 126 96 33 S Mid-Atlantic Ridge 23°N Basaltic lavas
46 396B 22°59.14´N 43°30.90´W Atlantic 4459 13 151 255 23 S Mid-Atlantic Ridge 23°N Basalt and breccia
49 410A 45°30.53´N 29°28.56´W Atlantic 2987 9 331 49 38 S Mid-Atlantic Ridge 45°N Basaltic lavas
49 412A 36°33.74´N 33°09.96´W Atlantic 2626 1.6 163 131 18 S Mid-Atlantic Ridge 33°N Basalt flows and intercalating limestone
51-53 417A 25°06.63´N 68°02.48´W Atlantic 5478 110 208 209 61 S Western Atlantic Basaltic lavas
51-53 417D 25°06.69´N 68°02.81´W Atlantic 5479 110 343 366 70 S Western Atlantic Basaltic lavas
51-53 418A 25°02.10´N 68°03.44´W Atlantic 5509 110 324 544 72 S Western Atlantic Basaltic lavas
54 428A 09°02.77´N 105°26.14´W Pacific 3359 2.3 63 53 39 F 9°N East Pacific Rise Basaltic lavas
63 469 32°37.00´N 120°32.90´W Pacific 3803 17 391 63 34 I Off California coast Basaltic lavas
63 470A 28°54.46´N 117°31.11´W Pacific 3555 15 167 49 33 I Off California coast Basaltic lavas
65 482B 22°47.38´N 107°59.60´W Pacific 3015 0.5 137 93 54 I Off Gulf of California Massive basalt and interlayered sediment
65 482D 22°47.31´N 107°59.51´W Pacific 3015 0.5 138 50 50 I Off Gulf of California Massive basalt and interlayered sediment
65 483 22°53.00´N 108°44.90´W Pacific 3084 2 110 95 40 I Off Gulf of California Massive basalt and pillow basalt with interlayered sediments
65 483B 22°52.99´N 108°44.84´W Pacific 3084 2 110 157 47 I Off Gulf of California Massive basalt and pillow basalt with interlayered sediments
65 485A 22°44.92´N 107°54.23´W Pacific 2997 1.2 154 178 51 I Off Gulf of California Massive basalt and interlayered sediments
68 501 01°13.63´N 83°44.06´W Pacific 3467 6.6 264 73 60 I South flank of Costa Rica Rift Basaltic lavas
82 559 35°07.45´N 40°55.00´W Atlantic 3754 35 238 63 37 S West flank of Mid-Atlantic Ridge 35°N Basaltic lavas
82 562 33°08.49´N 41°40.76´W Atlantic 3172 12 240 90 45 S West flank of Mid-Atlantic Ridge 33°N Pillow basalt and massive basalt
82 564 33°44.36´N 43°46.03´W Atlantic 3820 35 284 81 43 S West flank of Mid-Atlantic Ridge 34°N Pillow basalt and minor massive basalt
91 595B 23°49.34´S 165°31.61´W Pacific 5620 80 70 54 28 F Central South Pacific Vesicular aphyric basalt
92 597C 18°48.43´S 129°46.22´W Pacific 4147 30 53 91 53 F West flank South East Pacific Rise 18°S Massive basalt flows
106/109 648B 22°55.320´N 44°56.825´W Atlantic 3326 0 0 50 12 S Mid-Atlantic Ridge 23°N Pillow basalt
123 765D 15°58.560'S 117°34.51'E Indian 5714 140 928 267 31 F Argo Abyssal Plain Normal-enriched MORB basaltic lavas
129/185 801C* 18°38.538´N 156°21.59´E Pacific 5674 170 462 414 47 F Western North Pacific Pillow basalt, basalt flows, breccias
136 843B 19°20.54´N 159°5.68´W Pacific 4418 95 243 71 37 F West of Hawaii Basaltic lavas
69/70/83/111/137/140/148 504B 1°13.611´N 83°43.818´W Pacific 3463 6.9 274.5 1836.5 20 I South flank of Costa Rica Rift Basalt, stockwork, diabase
148 896A 1°13.006´N 83°43.392´W Pacific 3448 6.9 179 290 27 I South flank of Costa Rica Rift Basaltic lavas
185 1149D 31°18.79´N 143°24.03´E Pacific 5818 133 307 133 17 F Western North Pacific Pillow basalt, basalt flows, breccias
187 1162B 44°37.9´S 129°11.3´E Indian 5464 18 333 59 17 I Australian-Antarctic Discordance Basaltic lavas and breccia
187 1163A 44°25.5´´S 126°54.5´E Indian 4354 17 161 47 33 I Australian-Antarctic Discordance Basaltic lavas
187 1164B 43°45.0´S 127°44.8´E Indian 4798 18.5 150 66 16 I Australian-Antarctic Discordance Basaltic lavas
191 1179D 41°04.8'N 159°57.8´E Pacific 5564 129 377 98 44 F Western North Pacific Basaltic lavas
200 1224F 27°53.36'N 141°58.77'W Pacific 4967 46 28 147 26 F Central Pacific Basaltic lavas
203 1243B 5°18.07'N 110°04.58´W Pacific 3868 11 110 87 25 F Western flank of East Pacific Rise 5°N Basaltic lavas
206 1256C 6°44.18´N 91°56.06´W Pacific 3635 15 251 89 61 F Cocos Plate eastern flank East Pacific Rise Basaltic lavas
206 1256D 6°44.16´N 91°56.06´W Pacific 3635 15 251 502 48 F Cocos Plate eastern flank East Pacific Rise Basaltic lavas

Notes: S = slow (<40 cm/m.y.), I = intermediate, F = fast (>80 cm/m.y.). The holes listed here sampled normal mid-ocean-ridge basalt (N-MORB) crust formed at bare rock mid-ocean ridges and were initiated in lavas. We have not included holes from arc settings or holes spudded into plutonic rocks at tectonic windows or transform faults. Table adapted from separate compilations of hard rock drill holes by W. Bach, J. Alt, and D. Teagle. * = 60.2 m of alkali basalt sills that were intruded at the sediment/basement boundary some 20 m.y. after the formation of the crust in Hole 801C have been subtracted from the basement penetration in that hole.